The Montessori method is based on the premise that children are not simply adults in small bodies, but that children think and develop differently than adults. The Montessori method does not use traditional testing to measure a child's achievements because it is believed that quantifying children is damaging to their growth. Montessori assumes that all children are intelligent but that they learn in different ways. Children learn at their own pace rather through hands on experience rather than learning from a textbook. Montessori teachers spends little time giving group lessons and works with one or two children at a time.